Table 1 Sample characteristics at baseline for responders 3Â months after surgery, and nonresponders
| Â | Responders | Nonresponders | P-value |
|---|---|---|---|
N | 223 | 27 | Â |
Age (mean ± standard deviation) | 69.3 ± 9.8 | 69.1 ± 8.5 | 0.92 |
Female gender | 159 (71.3) | 20 (74.1) | 0.83 |
Marital status | 0.49 | ||
 Married | 149 (66.8) | 17 (63.0) |  |
 Widowed | 38 (17.0) | 5 (18.5) |  |
 Divorced/separated | 25 (11.2) | 5 (18.5) |  |
 Single | 11 (5.0) | - |  |
 Living with someone | 156 (70.0) | 19 (70.4) | 1.0 |
 Having children | 194 (92.8) | 27 (100) | 0.23 |
Educational level | 0.09 | ||
 Primary school | 54 (24.4) | 13 (48.1) |  |
 Secondary school | 94 (42.5) | 10 (37.0) |  |
 University <4 years | 41 (18.6) | 2 (7.4) |  |
 University ≥4 years | 32 (14.5) | 2 (7.4) |  |
Employment | 0.60 | ||
 Retired | 144 (64.6) | 17 (63.0) |  |
 Full- or part-time work | 35 (15.7) | 2 (7.4) |  |
 Sick leave | 18 (8.1) | 3 (11.1) |  |
 Disability pension | 26 (11.6) | 5 (18.5) |  |
Number of comorbidities | 0.11 | ||
 1 | 91 (40.8) | 17 (63.0) |  |
 2 | 55 (24.7) | 4 (16.0) |  |
 3 | 29 (13) | 4 (16.0) |  |
 >3 | 10 (4.5) | – |  |
 Missing data | 38 (17) | 2 (7.4) |  |